I used the first week or two to experiment with portion control also. Then spoke to the dietician, diabetes consultant and endocrinologist and they all agreed to give me another week of monitoring levels.
During that week I was very conscious of how much carbs I ate and that kept my levels under 7.0 every time. Even if it's 6.9 it's still under!
Just ask them about giving you one more week! One thing I noticed is they were very careful about monitoring and won't muck around if you have constant high levels!! That's why I was so strict with my diet and made it thru the ten weeks diet controlled :-)